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Texas oil lease

Producing

MARTIN MASON UNIT E

Martin Mason Unit E is an oil lease in McMullen County, Texas, operated by Ineos USA Oil & Gas LLC in the Eagleville (Eagle Ford-1) field.

2 wells

3,622bbl oil, last 12 months−13% vs prior year
Operator
Ineos USA Oil & Gas LLC
County
McMullen County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-15425

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Where it sits

This county

McMullen CountyMcMullenLa SalleAtascosaKarnesFrioLive OakMcMullen County
McMullen County
Gas, last 12 months
2,694 mcf
Oil in Jul 2026
262 bbl

Production by month

Oil output fell 13% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 13% over the last 12 monthsMonthly oil production and gas for MARTIN MASON UNIT E, Aug 2023 to Jul 2026. Oil output fell 13% over the last 12 months. 3,622 bbl in the 12 months through Jul 2026, against 4,161 bbl in the 12 months before.Last 12 months: 3,622 bblbbl per monthmcf per month00200100400200600300800400Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 13% over the last 12 monthsMonthly oil production and gas for MARTIN MASON UNIT E, Aug 2023 to Jul 2026. Oil output fell 13% over the last 12 months. 3,622 bbl in the 12 months through Jul 2026, against 4,161 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month00200100400200600300800400Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

91% of the gas went to lease fuel in the last 12 months

Flaring peaked at 100.0% of the gas in Nov 2023.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
91% of the gas went to lease fuel in the last 12 monthsShare of MARTIN MASON UNIT E gas by disposition code each month, Aug 2023 to Jul 2026. 91% of the gas went to lease fuel in the last 12 months. Flaring peaked at 100.0% of the gas in Nov 2023.Share of the lease’s gas by disposition code, per month0%50%100%Flared 100.0%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
91% of the gas went to lease fuel in the last 12 monthsShare of MARTIN MASON UNIT E gas by disposition code each month, Aug 2023 to Jul 2026. 91% of the gas went to lease fuel in the last 12 months. Flaring peaked at 100.0% of the gas in Nov 2023.Share of gas by disposition code0%50%100%Flared 100.0%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Lease fuel (1)

    91% · 2,442 mcf

  • Transmission line (2)

    6.8% · 184 mcf

  • Flared (4)

    2.5% · 68 mcf

2.5% of the gas flared in the last 12 months. 11 months above 3%.

Who has run this lease

The operator changed once, most recently in Apr 2023

Operators of this lease over timeChesapeake Operating, L.L.C., Jan 2020 to Mar 2023; Ineos USA Oil & Gas LLC, Apr 2023 to Jul 20262020202120222023202420252026Changed Apr 2023Chesapeake Operating, L.L.C.Jan 2020 to Mar 2023Ineos USA Oil & Gas LLCApr 2023 to now
Operators of this lease over timeChesapeake Operating, L.L.C., Jan 2020 to Mar 2023; Ineos USA Oil & Gas LLC, Apr 2023 to Jul 20262020202120222023202420252026Changed Apr 2023Chesapeake Operating, L.L.C.Jan 2020 to Mar 2023Ineos USA Oil & Gas LLCApr 2023 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

2 wells on this lease

Wells on MARTIN MASON UNIT E
API numberWell no.Status
42-311-342941HActive
42-311-34611F 4HShut-in

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Ineos Energy Marketing USA LLCOilGathers100Nov 1, 2023–
Ineos Energy Marketing USA LLCCasinghead gasBuys100Nov 1, 2023–
Williams Mlp Operating LLCCasinghead gasGathers100Oct 1, 2015–
Chesapeake Energy Mktg, L.l.c.Casinghead gasBuys100Sep 1, 2015Nov 1, 2023
Chesapeake Energy Mktg, L.l.c.OilGathers100Apr 28, 2023Nov 1, 2023
Chesapeake Energy Mktg, L.l.c.OilGathers20Sep 1, 2015Apr 28, 2023
Gulfmark Energy, Inc.OilGathers40Apr 5, 2012Apr 28, 2023
Valero Marketing and Supply Co.OilGathers40Jun 1, 2013Apr 28, 2023

SourceRailroad Commission Form P-4 file, Sep 24, 2026 (source).

Who buys my oilOil price check

350 acres on the newest permit

A pooling certificate was filed

Permits for Martin Mason Unit E
API numberWell no.Acreson the permit
42-311-34611F 4H350
42-311-342941H350

SourceRailroad Commission drilling permits, Sep 26, 2026 (source 1, source 2).

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for MARTIN MASON UNIT E
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Ineos USA26230525809$80.46$2.89
Jun 2026Ineos USA27233125009$84.81$3.15
May 2026Ineos USA28626125809$102.13$2.94
Apr 2026Ineos USA42832924807$100.32$2.77
Mar 2026Ineos USA28818625670$91.38$3.04
Feb 2026Ineos USA2593222642514$64.51$3.62
Jan 2026Ineos USA2843053581081$60.04$7.72
Dec 2025Ineos USA306313294441$57.97$4.26
Nov 2025Ineos USA29932124201$60.06$3.79
Oct 2025Ineos USA31015825506$60.89$3.19
Sep 2025Ineos USA302476505$63.96$2.97
Aug 2025Ineos USA326168606$64.86$2.91
Jul 2025Ineos USA317511000$68.39$3.20
Jun 2025Ineos USA335163000$68.17$3.02
May 2025Ineos USA343311000$62.17$3.12
Apr 2025Ineos USA341489000$63.54$3.42
Mar 2025Ineos USA331318000$68.24$4.12
Feb 2025Ineos USA297158000$71.53$4.19
Jan 2025Ineos USA434534000$75.74$4.13
Dec 2024Ineos USA231162220$70.12$3.01
Nov 2024Ineos USA362483000$69.95$2.12
Oct 2024Ineos USA370320000$71.99$2.20
Sep 2024Ineos USA374354000$70.24$2.28
Aug 2024Ineos USA426646000$76.68$1.99
Jul 2024Ineos USA231172000$81.80$2.07
Jun 2024Ineos USA1571000$79.77$2.54
May 2024Ineos USA513523303$80.02$2.12
Apr 2024Ineos USA429516000$85.35$1.60
Mar 2024Ineos USA00000$81.28$1.49
Feb 2024Ineos USA00000$77.25$1.72
Jan 2024Ineos USA00000$74.15$3.18
Dec 2023Ineos USA00000$71.90$2.52
Nov 2023Ineos USA199170404$77.69$2.71
Oct 2023Ineos USA2590413$85.64$2.98
Sep 2023Ineos USA42651920164$89.43$2.64
Aug 2023Ineos USA425522552431$81.39$2.58

Flared above 3%

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Sep 28, 2026.

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This lease belongs to

OperatorIneos USA Oil & Gas LLCFieldEagleville (Eagle Ford-1)CountyMcMullen County

Ineos USA Oil & Gas LLC in McMullen County

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